Fix and re-enable FreeList large object space for 64 bit

Not enabled on 32 bit due to virtual memory fragmentation concerns.
The new free list large object space ensures that allocations are
page aligned by using a side table for accounting data.

Bug: 17414549

Change-Id: Idbcbe75cb86b6d9b3d8b20f3048631a48c511458
5 files changed